Understanding Fibre Optics

What is the principle behind fibre optics?

• The principle behind fibre optics is total internal reflection.

• Refraction of light through a prism

• Absorption of light in a medium

• Diffraction of sound waves

Name the two main types of optical fibres.

• Fiber-optic and Plastic-optic

• Reflective and Refractive

• Standard and Advanced

• Single-mode and Multi-mode

What is total internal reflection in the context of fibre optics?

• Total internal reflection is the phenomenon that allows light to be confined within the core of a fiber optic cable, enabling efficient transmission of signals.

• Light travels in a straight line without any reflection in fiber optics.

• Total internal reflection occurs only in water.

• Light is absorbed by the core of the fiber optic cable.

How does the refractive index affect light transmission in fibre optics?

• A higher refractive index always results in faster light transmission.

• The refractive index has no effect on light transmission in fibre optics.

• Light can only travel through fibre optics if the refractive index is zero.

• The refractive index affects light transmission by enabling total internal reflection, which allows light to travel efficiently through the fiber.

What are the advantages of using fibre optics over traditional copper cables?

• Copper cables provide better security against eavesdropping.

• Fibre optics are more expensive to install than copper cables.

• Fibre optics offer higher bandwidth, faster speeds, lower interference, longer transmission distances, and reduced weight compared to traditional copper cables.

• Fibre optics are heavier and more difficult to handle than copper cables.

Explain the difference between single-mode and multi-mode fibres.

• Multi-mode fibres are used for long-distance communication only.

• Single-mode fibres can transmit multiple light modes simultaneously.

• Single-mode fibres support one light mode for long-distance communication, while multi-mode fibres support multiple light modes for shorter distances.

• Single-mode fibres are thicker than multi-mode fibres.

What is the role of a cladding layer in optical fibres?

• The cladding layer ensures total internal reflection, preventing signal loss in optical fibres.

• The cladding layer provides insulation against electrical interference.

• The cladding layer amplifies the signal in optical fibres.

• The cladding layer acts as a protective coating against physical damage.

How are fibre optic cables constructed?

• Fibre optic cables are constructed with a core, cladding, and protective outer layer.

• Fibre optic cables consist of a single solid metal core.

• Fibre optic cables are constructed with only a protective outer layer.

• Fibre optic cables are made of copper wires and plastic insulation.

What are some common applications of fibre optics in telecommunications?

• Common applications of fibre optics in telecommunications include high-speed internet connections, telephone networks, and cable television services.

• Traditional copper wiring for data transmission

• Wireless charging technology

• Satellite communication systems

What safety precautions should be taken when working with fibre optic cables?

• Use bare hands to handle cables

• Use any tools available without checking for compatibility

• Wear PPE, use proper tools, maintain a clean work area, and handle cables carefully.

• Ignore cleanliness in the work area